Portal: Cooperative is a multiplayer Portal mod, the mod comes with a 2 player map set, a 2 player Rexaura map set, an unfinished 3 player map set, and a playground map.

May 9, 2015 · On this guide, I will be teaching you how to create a multiplayer server. You will need to know how to open up the developer console. Just right click on Portal, go to …

Complete two-person co-op: Multiplayer game featuring its own dedicated story, characters, and gameplay. Advanced physics: Allows for the creation of a whole new range of interesting …

May 13, 2024 · So whether you missed checking it out the first time around or it‘s been awhile since you and friend embarked on those cooperative science-fueled misadventures, let me …

In this video, we'll cover the basics of gameplay, tips for survival, and strategies for success in this challenging first-person puzzle game. From portal placement to enemy avoidance, we've got...

Portal 2: Multiplayer Mod version 3.0.0 will be our definitive version, so we won't make any significant updates after it is fully released for a while. Before this happens, we will work on …

Multiplayer mechanics are hidden in singleplayer Source 1 games, and you can play cooperative with players online. The Server Browser is still on Singleplayer games, as it is left over code …

Jul 1, 2025 · The Cooperative Testing Initiative, or simply co-op, is a multi-player gamemode and campaign in Portal 2 whereby two players can join up and take part in test courses built …

Nov 14, 2025 · Does Valve plan to add co-op to other Portal games in the future? While there have been no official announcements regarding future Portal games or co-op support in older …

Feb 3, 2026 · Try Portal: Cooperative, which recently received a major update. There are a few multiplayer mods available for Portal, but if you want to revisit Valve's classic puzzle-platform …